![]() The credit card has a valid number if the total can be divided by 10 and if not then do not process the credit card transaction. Total your list of numbers while excluding the checksum digit.And the sum of the two digits will be five. If you have a credit card with 15 digits, just double the results of digits in a number greater than 10, add the two digits of the new number together, and write that result into your list.įor example, if the number on the card is 7, duplicating it will be 14.If you have a credit card with 16 digits, just double the amount of each digit from right to left.List each digit of your credit card number, starting with the left of the checksum and moving to the left.Write down the last digit of your credit card which is the checksum digit that helps to check the remainder.There are two ways that a credit card validator works:. The working principle of a Credit Card Validator is very simple as it uses the Luhn Algorithm to determine the validity of a card using the account number and checksum. It supports all major credit card brands such as VISA, MasterCard, American Express, Diner's Club, JCB. ![]() The algorithm used in Credit Card Validator is the Luhn algorithm or mod 10 algorithm which is a simple checksum formula that determines the validity of a card using the account number and checksum digits. Credit Card Validator helps implementing validations for the credit cards, variety of identification numbers such as credit card numbers, IINs (Issuer Identification Numbers) and BINs (Bank Identification Numbers), prefixes, etc through the Luhn algorithm.
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